DT A-level Exam Questions Correctly
Solved.
Thermoplastic - CORRECT ANSWER Can be molded or formed when heated
Thermoset - CORRECT ANSWER having the property of becoming permanently hard and rigid when
heated or cured
LDPE - CORRECT ANSWER Low density, low stiffness, good chemical resistance
Detergent bottles, toys and carrier bags
Acrylic - CORRECT ANSWER Tough, hard, durable, easily machined.
used in light units, car light lenses, illuminated signs
HDPE - CORRECT ANSWER Good stiffness and chemical resistance.
Commonly used for milk containers and soft drink bottles; it may also be used for landfill liners.
PET - CORRECT ANSWER Moderate chemical resistance.
Blow moulding, electrical plugs and sockets
PVC - CORRECT ANSWER Good chemical resistance, weathering resistance, hard, tough, lightweight, can
be coloured.
Flexible hoses
ABS - CORRECT ANSWER High impact strength, good toughness, scratch resistant, lightweight and
durable.
Kitchen products, mobile phones, toys, cases
,Epoxy resin - CORRECT ANSWER electrical insulator, hard, resists chemicals well, brittle unless
reinforced.
Used for adhesives, bonding of other materials and encapsulation of electrical components
Urea formaldehyde - CORRECT ANSWER - rigid
- hard
- good strength
- brittle
- heat-resistant
- good electrical insulator
electrical fittings,adhesives
Polyester resin - CORRECT ANSWER Rigid, brittle, good chemical resistance.
Casting GRP
Rubber - CORRECT ANSWER Abrasion and tear resistant
Ferrous - CORRECT ANSWER Metals, including iron, that are utilized in the production of iron and steel.
Non-ferrous - CORRECT ANSWER Do not contain iron. They do not rust and are not magnetic however
they are prone to corrosion
Aluminium - CORRECT ANSWER Kitchenware,
excellent electrical conductor
Copper - CORRECT ANSWER Electrical contacts, water pipe, electrical cables
Zinc - CORRECT ANSWER Galvanising, can be die casted to produce high detailed products e.g. locks
, Tin - CORRECT ANSWER steel-plate coatings. food cans
Duralumin - CORRECT ANSWER Structural components for aircraft
Brass - CORRECT ANSWER Cast valves and taps. boat fittings and ornaments
stainless steel - CORRECT ANSWER Tough, wear and corrosion resistant.
Sinks, cutlery and sanitary-ware
Mild steel - CORRECT ANSWER Nuts, bolts, washers, car bodies
High carbon steel - CORRECT ANSWER Hand tools, scribers, dot punch, chisels
Medium carbon steel - CORRECT ANSWER Used in garden tools, springs. Strong and hard but less
ductile, tough or malleable.
Cast iron - CORRECT ANSWER Machine parts, break disks, engines
GRP - CORRECT ANSWER Glass spun to produce a fibre. Coated to aid bonding to resin. Laying up
process
MDF - CORRECT ANSWER Base for veneers, furniture sides, pattern making for casting
Hardboard - CORRECT ANSWER Backs of cupboards and drawers. Bottom of kitchen units
Chipboard - CORRECT ANSWER Knockdown furniture, kitchen cupboards and worktops; usually
veneered or laminated for furniture; also used for flooring.
